Magnetic head
AssigneeSony Corporation
InventorsTakashi Kawashima, Yutaka Okazaki
Life of this patent
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Abstract
A magnetic head, in the form of a MIG head, having a magnetic metal film formed in the vicinity of the magnetic gap, is provided, in which the thickness of the magnetic metal film in a direction perpendicular to the magnetic gap is not less than 1.0 .mu.m and not more than 4.4 .mu.m and the gap length of the magnetic gap is 0.23 .mu.m to 0.32 .mu.m. The magnetic head is improved in recording characteristics in a specified short wavelength range and hence in the playback output so that it may be advantageously employed for a high digital recording format.
Claims7
A metal-in-gap magnetic head having first and second magnetic core halves with a magnetic metal film formed on at least the region of a magnetic gap between said core halves,
- wherein the improvement resides in that each of said first and second magnetic core halves has a planar surface confronting and parallel relative to one another across said magnetic gap, and a pair of inclined surfaces disposed on opposite sides of said planar surfaces rendering each of said core halves in a tapered shape;
- a first magnetic metal film and a second magnetic metal film formed on said first and second magnetic core halves, respectively, to cover said planar surface and said inclined surfaces of each of said core halves;
- said magnetic metal films having a thickness in a direction perpendicular to the magnetic gap of not less than 1.0 .mu.m and not more than 4.4 .mu.m, and said magnetic gap having a length of not less than 0.23 .mu.m and not more than 0.32 .mu.m;
- and
- wherein said head is capable of recording signals having wavelengths in the range of 0.4 .mu.m to at least 0.7 .mu.m.
Dependencies are inferred from the claim text.